John a



J. A. GROSHON.

Elevator.

Patehted Mar. 16; 1880.

have 72107 N-FETER& EHOTO-LITHC "KER. WASHINGTON, 9.0.

, ward and have their ends connected by the UNITED STATES PATENT OFFICE.

JOHN A. GROSHON, OF NEW YORK, N. Y.

ELEVATO R.

SPECIFICATION forming part of Letters Patent No. 225,473, dated March 16, 1880.

Application filed December 29, 1879. I

To all whom it may concern:

Be it known that I, JOHN A. GRosHoN, of New York, in the county of New York and State of New York, have invented a new and 5 useful Improvement in Elevators, of which the following is a specification, reference being had to the accompanying drawings.

The invention relates to an improvement in elevators; and it consists in the arrangement and construction of the steam-cylinder and the retarding-cylinders with their valves and connections, as hereinafter fully described.

Referring to the accompanying drawings, Figure l is a side View of the invention. Fig. 2 is a central vertical section of one of the re- I tarding-cylinders, showing the two passages in the pipe L. Fig. 3 is a central vertical section of the steam cylinder and chests. Fig. 4 is a section through the chest I, showing the entrance of the pipes m n to the valve.

- A indicates the steam-cylinder, and B D the retarding or water cylinders, all mounted in an upright position upon a suitable frame, and each supplied with a piston lettered, respectively, a b c, the rods d of which pass downhorizontal carriage E, in order that the pistons may all move simultaneously. Upon the carriage E, between the rods d, are secured the pulley-wheels e, over which and the pulley-wheels f, secured between the upper ends of thecylinders A B D, pass the ropes F, which connect with the elevator-car, and which, as theyare drawn upon the said pulley-wheels or .slackened, cause the said car to be elevated or lowered. l

The steam-cylinder A has upon its upper portion the chest H, provided with the valve h, and upon its lower portion the chest I, containing the hollow valve i. These valves h z' are connected by the rodK, passing from one chest to the other, by which they are operated, the rod being actuated by the pulleyk or other suitable means.

From the upper end of each of the cylinders B D passes downward the pipe I, which pipes connect at the base of the cylinders with the pipe L, having two passages, m n, which extend into the chest I and operate in connection with the valve '5. At the point where the pipes Z meet the pipe L there are two ports, m

n, the former connecting one passage of the pipe L with the pipes Z, and the latter, which is independent of the port m, leading from the other passage in the pipe L directly into the cylinders B D. Through the ports m and pipes l the water passes to and returns from the upper side of the pistons a b, and through the ports a, the same passage of the water is permitted to and from the lower side of the pistons a I).

From the chest H, containing the hollow valve h, twoports, M N, pass to the cylinder A, the port M leading the steam to the upper end thereof, and the port N to the lower end,

whereby'steam may be admitted to either side of the piston b. r

The hollow balance-valve 'i is arranged so that upon its upward stroke it permits the water in the cylinders 13 D below the pistons a b to flow from the passages a, through the valve, and into the passage m,, whence it passes through the ports m up the pipes Z, and into the cylindersBD, above the pistons a 1). Upon the downward stroke of the valve t it allows the return of the water from the passages m, through the chest I, and into the passages n, whence it is forced through the ports n into the cylinders B D again below the pistons.

%n the operation of the machine the rod K, W1 h the valves h i, is drawn upward, opening the port M and the passage n. Through the port M then passes the steam into the cylinder A, driving the piston c, and also the pistons a If and carriage E, downward. The pistons a 1) during this movement force the water below them in the retarding-cylinders out through the port a and passage a into the chest I, whence it passes, through the valve t, the passage m, and port m, into the pipes l, which conduct it into the retarding-cylinders at their upperend. The downward movement of the pistons a Z) c and their rods also drives the carriage E and the rope F downward, causing the elevator-car to ascend. To arrest the car at any point during its movement it is simply necessary to move the valves h t sufficiently to close the ports Mn by moving the rod K. To start the caragain, reverse this last movement of the rod K.

To cause the car to descend, it is necessary to lower the rod K with the valves h i. This closes the port M and opens the port N, which leads the steam to the under side of the piston 0, driving it and its connections, which are the carriage E and pistons a I), upward. This slackens the rope F and permits the descent of the elevator-car. The pistons a I) drive the Water back again, through the pipes L, passages m, and valve i, into the passages 02, which conduct it to the cylinders B D, below the pistons a b. v

If it is desired to employ a tank in connection with the elevator above described, the cylinders B D may be used as the power-cylinders, and the cylinder A simply for overcoming the pressure of the water when lowering the car. In this case the discharge and return pipe of the tank will enter the chest I, so as to communicate, through the pipes L l, with the cylinders B D, and the pistons a b 0 will be forced downward by the weight of the water alone, and upward, when the weight in the car is not sufficient to drive the water back through the pipes into the tank, by steam he in g admitted through the port N to the under side of the piston c. When the tank is not employed the port N may be dispensed with, as the weight of the car will cause the pistons to ascend without the aid of steam.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In an engine, the steam-cylinder A, supplied with suitable ports and valves, and the water-cylinders B D, having suitable ports, in combination with the pipes land pipes m n, substantially as set forth.

2. The vertical cylinders A B D, having pistons which drive the carriage E, and the valves h 1', connected by a rod, K, in combination with the pipes 1, ports m n, and pipes m n, substantially as set forth.

3. The cylinders A B D, pistons a b c, and valves h 1;, connected by a rod, in combination with the pipes Z, ports on n, pipes on n, carriage E, and ropes F, operating the car, substantially as specified.

In testimony that I claim the foregoing improvement in elevators, as above described, I have hereunto set my hand this 20th day of December, 1879,

JOHN A. GROSHON.

Witnesses:

Cats. 0. GILL, JAMES F. RYAN. 

